German Chancellor Angela Merkel (R) and daughter of US President Donald J. Trump, Ivanka Trump (L) attend a joint discussion with business representatives at the White House in Washington, DC, USA, 17 March 2017. Merkel's original visit on 14 March had to be postponed due to bad weather. (Photo by Clemens Bilan/EPA)

Palestinian workers prepare golden crescent to set it on top of a mosque's minaret in the East Jerusalem neighbourhood of Issawiya March 17, 2017. (Photo by Ammar Awad/Reuters)

A policeman stands guard on March 17, 2017 as supporters of presidential candidate Francisco Guterres from the Revolutionary Front for an Independent East Timor party ride through the street campaigning ahead of next week’s elections in Dili, East Timor. (Photo by Lirio Da Fonseca/Reuters)

Competitors take part in Jerusalem's 7th marathon, on March 17, 2017. (Photo by Thomas Coex/AFP Photo)

Two policemen stand near the burnt-out police bus in Hamburg, Germany on March 17, 2017. Extreme-left activists have claimed responsibility for an arson attack on two police vehicles overnight in Hamburg. Police said they suspected the attack could be related to the July G20 summit. The port city has been cited as a hub for extreme-left activism. (Photo by Daniel Bockwoldt/DPA)

People carry the body of a Somali refugee, killed in attack by a helicopter while travelling in a vessel off Yemen, at the Red Sea port of Hodeidah, Yemen March 17, 2017. (Photo by Abduljabbar Zeyad/Reuters)

Models gather before a show of the Firdaws fashion house led by Aishat Kadyrova, daughter of the Chechen Republic head Ramzan Kadyrov, at the Mercedes-Benz Fashion Week Russia in Moscow, Russia, March 17, 2017. (Photo by Sergei Karpukhin/Reuters)

An Orca is examined after it washed up at Whatipu Beach on March 14, 2017 in Auckland, New Zealand. A team from the Coastal – Marine Research Group at Massey University conduct a necropsy to establish cause of death, and take biological sample to assess diet and pollutant loads in the adult male whale. (Photo by Fiona Goodall/Getty Images)

Firefighters battle a five-alarm fire burning an apartment building and surrounding structures in downtown Raleigh, N.C., Thursday night, March 16, 2017. Fire was consuming an apartment building under construction. The cause of the fire is under investigation. (Photo by Chris Seward/The News & Observer via AP Photo)

Indonesian fishermen process their catch which include sharks at a fishing village in Brondong, East Java on March 13, 2017. Indonesia, the world' s largest archipelago, ranks among the largest producers of aquaculture worldwide with the government setting a target to achieve 31 million tons of fish from the industry by 2019, a two- fold increase compared to the current yearly production, with an estimated value of 65.8 trillion rupiah (USD 28.67 billion). (Photo by Juni Kriswanto/AFP Photo)

England's Jack Nowell, right, tackles Scotland's Finn Russell during the Six Nations rugby union international between England and Scotland at Twickenham stadium in London, Saturday March 11, 2017. (Photo by Alastair Grant/AP Photo)

People drink wine and eat a type of scallion or green onion known as calsot, during a calsotada on the outskirts of Barcelona, Spain, Sunday, March 12, 2017. Calsotada is an annual event in Catalonia to celebrate the harvest of calsots, which are grilled over a hot fire, wrapped up in newspaper, served on terra cotta tiles and eaten with bare hands after being dipped in romesco sauce, accompanied by red wine and bread. (Photo by Emilio Morenatti/AP Photo)

This handout photo taken on March 16, 2017 and released on March 17, 2017 by the British Embassy in Ethiopia shows British Foreign Secretary Boris Johnson watching a plaster replica of the reconstructed skeleton of early australopithecine “Lucy” at the National Museum of Ethiopia in Addis Abeba on March 16, 2017, on Johnson's second leg of a three-day East Africa tour. (Photo by AFP Photo/British Embassy in Ethiopia)

Britain's Foreign Secretary Boris Johnson uses his phone to take a picture of elephants at the Lewa wildlife conservancy sprawling over the Laikipia plains in northern Kenya, March 17, 2017. (Photo by Thomas Mukoya/Reuters)

The Japanese action comic punk band Peelander-Z performs at the Valhalla at the South by Southwest (SXSW) Music Film Interactive Festival 2017 in Austin, Texas, U.S., March 15, 2017. (Photo by Brian Snyder/Reuters)

Keg balancing artist Nick Milan of Indianapolis carries audience member Ben Mang of New York City during his act at the Independence and Lagunitas Bug Out party at the Scoot Inn during South by Southwest Tuesday, March 14, 2017, in Austin, Texas. (Photo by Jay Janner/Austin American-Statesman via AP Photo)

Lizzo performs at the Independence and Lagunitas Bug Out party at the Scoot Inn during South by Southwest Tuesday March 14, 2017, in Austin, Texas. (Photo by Jay Janner/Austin American-Statesman via AP Photo)

Boys look at the tomb of Michael Almeda, who was among those allegedly killed by the Bonnet Gang, in more than 60 drug-related vigilante killings in the town of Pateros, Metro Manila, Philippines March 15, 2017. (Photo by Erik De Castro/Reuters)

Australian Foreign Affairs Minister Julie Bishop hands over a gift to a student from the Autonomous Region of Muslim Mindanao (ARMM) during a visit in Davao city, southern Philippines March 17, 2017. (Photo by Lean Daval Jr./Reuters)

A young woman wears SNP stickers on her face at the Scottish National Party's conference in Aberdeen, Scotland, Britain March 17, 2017. (Photo by Russell Cheyne/Reuters)

This picture taken on February 21, 2017 shows a tourist visiting the “816 Nuclear Military Engineering” installation in the mountains of Fuling district, in southwest China's Chongqing Municipality. It was a top-secret Chinese nuclear facility with a deadly Cold War mission – to make plutonium for an atomic bomb – but these days its doors are wide open as a tourist attraction. (Photo by Wang Zhao/AFP Photo)

Indonesian priests baptize a Christian pilgrim in Jordan river at the Yardenit baptismal site in Israel, Friday, March 17, 2017. (Photo by Dusan Vranic/AP Photo)

Paragliders fly during the Paragliding Accuracy World Cup 1st Series 2017 at Mount Tumpa on March 17, 2017 in Manado, Indonesia. (Photo by Robertus Pudyanto/Getty Images)

A man reads an issue of Gunes, a Turkish pro-government daily newspaper, with on an inside page German Chancellor Angela Merkel depicted in Nazi uniform with a Hitler-style moustache and doing the Nazi salute, on March 17, 2017 in Istanbul, Turkey. Right-wing tabloid-style daily Gunes (“Sun”) printed the picture along with the words in German: “#Frau Hitler” and called her an “ugly aunt”, amid a bitter war of words between Ankara and Berlin. Turkey and Europe are locked in a bitter spat after Germany and the Netherlands blocked Turkish ministers from holding rallies to campaign for a “yes” vote in next month's referendum on expanding President Recep Tayyip Erdogan's powers. (Photo by Yasin Akgul/AFP Photo)

Irish wolfhound Domhnall and a member of the Irish Guards prepare for a St Patrick’s Day parade and visit from the royal family on March 17, 2017 in London, England. (Photo by Peter Nicholls/Reuters)

Elementary school students crouch during an evacuation drill in Oga, Aomori prefecture, northern Japan Friday, March 17, 2017. For the first time the Japanese government held an emergency drill aimed at protecting its citizens in case a ballistic missile is launched toward Japan. Over 100 residents and schoolchildren of the coastal city of Oga in Northern Japan participated in the Friday drill which lasted about half an hour. (Photo by Jun Hirata/Kyodo News via AP Photo)

In this August 26, 2009 file photo, elephant keepers assist Motola, a 48-year-old female elephant who lost part of her left front leg after stepping on a land mine 10 years ago, after attaching her with an artificial leg at the Elephant Hospital in Lampang province, northern Thailand. What is believed to be the world's first elephant hospital says it may have to close because of budgetary problems after a decade of declining contributions. The Friends of the Asian Elephant foundation, which operates the hospital, said Friday, March 17, 2017, it is facing bankruptcy unless it receives financial assistance from the Thai government. (Photo by Apichart Weerawong/AP Photo)

Laurie Blouin of Canada competes in the Women's Snowboard Big Air final on day 10 of the FIS Freestyle Ski and Snowboard World Championships 2017 on March 17, 2017 in Sierra Nevada, Spain. (Photo by Clive Rose/Getty Images)

A Tsimane man monitors a burning field, among a group of indigenous people with a traditional lifestyle deep in the Bolivian Amazon, and according to a new study released Friday March 17, 2017, they have some of the healthiest hearts on the planet, according to Dr. Randall Thompson, a cardiologist at St. Luke’s Health System in Kansas City, Missouri, USA. Scientists say the new findings underline the significance of lowering the traditional risk factors for heart disease, and like the Tsimane people, we should be physically active and have a low fat, low sugar diet. (Photo by Michael Gurven/St. Luke’s Health System Kansas City via AP Photo)

Bodies of Somali migrants, killed in attack by a helicopter while traveling in a boat off the coast of Yemen, lie on the ground at Hodeida, Yemen, Friday, March 17, 2017. A helicopter gunship attacked a boat packed with Somali migrants off the coast of Yemen overnight Thursday, killing at least 31 people, according to a U.N. agency, Yemeni officials and a survivor who witnessed the attack. (Photo by Abdel-Karim Muhammed/AP Photo)

In this March 2, 2017 image made from video, conservationists of Borneo Orangutan Survival (BOS) Foundation release an orangutan back into the wild in Kehje Sewen Forest, East Kalimantan, Indonesia. Conservation groups in Indonesia have returned 17 critically endangered orangutans to their natural forest habitat in the past month, airlifting some by helicopter to a remote area of Borneo where they hope the rehabilitated great apes will be safe from human encroachment. (Photo by AP Photo)

With a 360-degree camera on the back, the Whitehaupteeadler “Manitu” lands on March 10, 2017 in the falconry Herrmann in Plauen (Saxony), Germany. The camera records the flight of the birds of prey. Subsequently, the film sequences are edited and cut. The finished films from the point of view of the eagle can then be viewed on mobile terminals or via 3D glasses. (Photo by Hendrik Schmidt/DPA)

A picture taken on March 16, 2017 shows women dressed up as mermaids posing by a pool at a mermaid training school in Moscow. Russian women who have dreamt of becoming a mermaid since their youngest years, start turning their fantasies into reality with a new type of fitness – mermaid swimming. (Photo by Natalia Kolesnikova/AFP Photo)

A picture taken on March 16, 2017 shows women practicing swimming with mermaid tails at a mermaid training school in a pool in Moscow. (Photo by Natalia Kolesnikova/AFP Photo)